TeX, LaTeX and Friends - 2021-06-18

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4:13 AM

\documentclass{beamer}
\title{Foo}
\author{}
\date{dd/mm/yyyy}
\usetheme{Copenhagen}

\begin{document}
\maketitle
\begin{frame}
\frametitle{Contents}
\tableofcontents
\end{frame}
\section{Section1}
\begin{frame}{Frame 2}
\end{frame}
\section{Section1}
\begin{frame}{Frame 3}
\end{frame}
\section{Section1}
\begin{frame}{Frame 4}
\end{frame}
\section{Section1}
\begin{frame}{Frame 5}
\end{frame}
\end{document}

How to distribute the sections in the headline ?

user image

How can I make the latter two sections appear on the other side of the header ?

2 hours later…

6:07 AM

@JosephWright got something strange this morning. I'm changing the \ohm symbol of siunitx to use \text{$\upOmega$} in my preamble. I get the following two \show calls (seemingly added for debugging?) with siunitx version 3.0.11:

> \l__siunitx_symbol_tmpa_tl=macro:
->\mathrm {Ω}.
<argument> \show \l__siunitx_symbol_tmpa_tl
                                            \show \l__siunitx_symbol_tmpb_tl...
l.85 \begin{document}

?
> \l__siunitx_symbol_tmpb_tl=macro:
->\mathrm {\protect \text  {$\upOmega $}}.
<argument> ...tl \show \l__siunitx_symbol_tmpb_tl
                                                  \group_end: \prg_return_fa...
l.85 \begin{document}

?

6:23 AM

@JosephWright with the latest version (just updated) this doesn't happen.

6:39 AM

@Skillmon I remember this came up here in chat before (a few days ago). You might have luck searching for it to get Joseph's response.

1 hour later…

samcarter_looks_forward_TUG'21

8:03 AM

@gaufler the other side of the header is for subsections

@Skillmon you were lucky it was only \show not \tracingall that got left in.

3

8:25 AM

Here is an interesting one we don't quite understand

\documentclass{article}
\newlength{\varheight}
\usepackage{xcolor}
\begin{document}
\fboxsep=0pt
$\dot{\overline{P}}^A$
$\overline{P}^A$
\settoheight{\varheight}{$\overline{P}$}% Capture height of \overline{P}
$\color{green}\dot{\overline{P}}\rule{0pt}{\varheight}^A$
$\color{red}\dot{\overline{P}}\vphantom{\overline{P}}^A$
$P^A$

These have the same height

\fbox{$\vphantom{\overline{P}}$}
\fbox{$\overline{P}$}
\fbox{\rule{1pt}{\varheight}}

\end{document}

Came up in a discussion. Why is ^A not placed the same in both the green and red example. I've shown below that they have the same height. What are we missing?

@daleif er well, it's the difference between these two, so it's just a matter of perusing appendix G .....

\accent\fam0 _
.\overline
..\fam1 P
\mathord
.\hbox(8.8332+0.0)x0.0
..\rule(8.8332+0.0)x0.0
^\fam1 A



\accent\fam0 _
.\overline
..\fam1 P
\mathchoice
D\mathord
D.\hbox(8.8332+0.0)x0.0
T\mathord
T.\hbox(8.8332+0.0)x0.0
S\mathord
S.\hbox(6.78323+0.0)x0.0
s\mathord
s.\hbox(5.41656+0.0)x0.0
\mathord
^\fam1 A

Should mathchoice then end up with the same height? or are there no height? I cannot really read this

@daleif and removing any suspicion that it's a color node getting in the way

\documentclass{article}
\newlength{\varheight}

\begin{document}
\fboxsep=0pt
\showoutput

\settoheight{\varheight}{$\overline{P}$}% Capture height of \overline{P}
$\rule{0pt}{\varheight}^A\showlists$
$\vphantom{\overline{P}}^A\showlists$

\end{document}

I already knew the colors did not affect anything.

@daleif but extra braces fix it, I wonder if we dare change vphantom?

\documentclass{article}
\newlength{\varheight}

\begin{document}
\fboxsep=0pt
\showoutput

\settoheight{\varheight}{$\overline{P}$}% Capture height of \overline{P}
$\rule{0pt}{\varheight}^A\showlists$
$\vphantom{\overline{P}}^A\showlists$
${\vphantom{\overline{P}}}^A\showlists$

\end{document}

@daleif yes but I didn't and needed to make sure that I wasn't to blame:-)

8:41 AM

@DavidCarlisle always the first thing to do.

@DavidCarlisle who wrote \vphantom?

I just do not understand what goes wrong here? I always assumed that a phantom always had the same characteristics as the original.

@UlrikeFischer not me (I think?)

@daleif I think it's placing the superscript on the subsubscript choice, which seems.... odd.

@DavidCarlisle I don't know. The only two changes entries say

% \begin{macro}{\phantom}
% \changes{v1.0p}{1994/11/18}
%         {(DPC) use \cs{expandafter} instead of \cs{next}}
% \changes{v1.0p}{1994/11/18}
%         {(DPC) colour support}

@DavidCarlisle hmm, that seems plausable. Hmm, there might be people relying on this wrong behavior.

8:52 AM

@daleif it doesn't get it wrong for a general mathchoice, this is right

$
\mathchoice{X}{x}{{a\over b}}{{X\over Y}}^n
X^n
x^n
{X\over Y}^n
$

\bye

@UlrikeFischer two excellent changes, don't you think?

@UlrikeFischer what was the tex "feature" we had to work round not long ago were tex-the-program has an "optimisation"x that doesn't correctly repack boxes whose size has changed? (@PhelypeOleinik)

@DavidCarlisle is it this problem? tex.stackexchange.com/questions/165499/…

@UlrikeFischer yes exactly and @wipet's answer is better than the accepted one I think. ( I just voted for it:-)

2 hours later…

10:31 AM

@egreg (@DavidCarlisle) I am thinking (again) of having a look back over breqn and seeing which bits might be useful longer-term - ironically, I think that everything except the automatic breaking is probably 'on the list' ;)

@Skillmon Indeed - was only present for a day or so

@DavidCarlisle To be fair, v3 is a lot faster than v2 partly as the tracing is a lot lighter (relatively)

@JosephWright while pushing a few people to adapt to the pdfmanagement I came again across "overprint/knockout" which is e.g. in colorspaces. We should have some code and interface for it. But where at best? in l3color?

@UlrikeFischer There are a few of those things at the 'trapping' end that we need to think about - I'm not sure they are strictly colour-related, but at the same time I don't have a good suggestion for where they do live

@UlrikeFischer Perhaps in l3pdf?

@JosephWright perhaps we should rename l3opacity in l3graphicstates.

@UlrikeFischer That's a possible, yes - there are a few other things that we need. There's a reason I just put it in the trial area for a bit of experimentation

@UlrikeFischer I guess we should list out all of the stuff that needs to go in there and see how it looks

10:53 AM

@Rmano Hi, sorry missed the message yesterday (having some busy time). You can switch what we informally call the "strict" mode, formally halt-on-error, see overleaf.com/learn/how-to/… for details. Other than that, as you pointed out, it's very difficult to grab the errors.

@JosephWright perhaps also the text parameters from the pdfrender package.

11:08 AM

@UlrikeFischer Yes, so like you say l3graphicstate looks the way to go

11:25 AM

@yo' looks like tikz is going to change here so this particular case will go

@egreg, @DavidCarlisle (@daleif) github.com/josephwright/mathtoys - Have to see where I get to

@JosephWright do we allow chemists to play with our toys?

2

@JosephWright you do know that people ignore sentences like "this code should not be used in production" and blame you for errors anyway?

@UlrikeFischer Yes ;)

@UlrikeFischer afterpage

11:29 AM

@UlrikeFischer Currently no actual code so I'm relatively safe - it might not get anywhere, but I would like to see if I can extract some of the bits of breqn I like the idea of

11:41 AM

hi there! is any chance to update MikTex packages from command line without opening console all the time to verify if there are some packages updates? Or maybe a task scheduler in windows with some parameteres?

12:04 PM

@Mafsi you can use mpm on the command line docs.miktex.org/manual/mpm.html

@yo' the good news is that this problem will be fixed soon: github.com/pgf-tikz/pgf/issues/1025 !

@Rmano yay!

12:27 PM

@UlrikeFischer Thanks a lot, @UlrikeFischer!

@samcarter_looks_forward_TUG'21 I think I've found another strange but funny package that maybe can be added to the `PackageOfTheDay` repository.
Would you prefer me to add a new comment, or edit the one I wrote before?
I'm asking because this package has nothing to do with calendar-related packages :D

samcarter_looks_forward_TUG'21

@LukeTheWolf Whatever is easier for you

@samcarter_looks_forward_TUG'21 It's the same thing, but I think it makes more sense to put a new comment, detached from the previous one :)

samcarter_looks_forward_TUG'21

@LukeTheWolf I just saw your edit - thanks! Just leave it as it is.

1:14 PM

@samcarter_looks_forward_TUG'21 wow, I feel honored --- two packages by me on the list!

Although thinking well one idea is from Randall Munroe and the other one is... picture mode ;-)

samcarter_looks_forward_TUG'21

@Rmano both picture mode and Randall Munroe are a guarantee for success :)

1:30 PM

@samcarter_looks_forward_TUG'21 I don't think that afterpackage should be in your package list. What it tries to do can be done now with proper LaTeX hooks, without redefining internal commands like \@popfilename. (I didn't test if it breaks with a current latex, but I wouldn't be surprised if is does).

@samcarter_looks_forward_TUG'21 the list at your github is rather short?

@DavidCarlisle :-O listing at celtic music now, so I hope to learn more from entry #3 ;-)

@Rmano here? github.com/samcarter/PackageOfTheDay/blob/main/README.md

@DavidCarlisle there is an issue.

@UlrikeFischer I assumed that since pineapple encouraging packages were banned, @samcarter_looks_forward_TUG'21 had had no submissions.

1:39 PM

@DavidCarlisle you could change the documentation of typewriter to shorten the list.

samcarter_looks_forward_TUG'21

@DavidCarlisle At the moment I'm just collecting. I'll keep doing the ducks of the year until end of this month and then switch to package of the day.

@UlrikeFischer thx. I'll keep that in mind

2:06 PM

@DavidCarlisle I wish I could shorten github.com/josephwright/mathtoys/commit/…

2:20 PM

quack

weeeeee twitter.com/shouldhaveaduck/status/1405888820134891529

2

2:32 PM

@JosephWright use context

@DavidCarlisle :)

@PauloCereda there was a rubber duck on the bbc news last night, something to do with understanding comets or asteroids or something.

@DavidCarlisle ooh

bbc.co.uk/news/uk-england-wiltshire-57511670

@PauloCereda ^

samcarter_looks_forward_TUG'21

@DavidCarlisle Local newspaper also had duck news today: two men wanted to buy ducklings from a farmer, they celebrated the deal with drinks, got into a fist fight and the police had to come to stop the fight - I hope the ducklings were not harmed :)

@UlrikeFischer Out of curiosity I just tested afterpackage and it seems to still work with current latex.

2:39 PM

user image

7

@PauloCereda /quack

@JosephWright /quack

3:37 PM

@DavidCarlisle @UlrikeFischer see what you have done?

@DavidCarlisle ;-) but you mentioned the package ...

3:51 PM

@UlrikeFischer can you read Frank's message or is it somewhat low resolution?

@DavidCarlisle very low resolution ;-)

2 hours later…

6:19 PM

ooh

samcarter_looks_forward_TUG'21

@PauloCereda Wrong language, but cute logo: meta.stackoverflow.com/a/408478/2777074

@samcarter_looks_forward_TUG'21 ooh a duck

3 hours later…

9:19 PM

Oh no! updating homebrew and it deleted the cask duckstation

3

(I have no idea what this is, I just thought it was funny.)

1 hour later…

10:41 PM

user image

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